TY  - RPRT
TI  - Ancient engineering geology projects in China; A canal system in Ganzu province and trenches along the Great Wall in Ningxia Hui Autonomous Region
AU  - R. E. Wallace
AU  - R.C. Bucknam
AU  - Thomas C. Hanks
PY  - 1994
DO  - 10.1016/0013-7952(94)90003-5
UR  - https://pubs.usgs.gov/publication/70017006
ID  - 70017006
ER  -